Variable-speed gearing.



J A. LOITRON.

I VARIABLE SPEED GEARING;

APPLICATION FILED AUG. 7, 1907.

901 ,456. Patented Oct. 20, 1908.

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A. LOITRON. VARIABLE SPEED GBABING.

APPLICATION rum) AUG. 7, 1907.

Patented Oct. 20, 1908.

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| u I II ACHILLE LOITRON, OF PLAINE ST. DENIS, FRANCE.

VARIABLE-SPEED GEARI-NG.

To all whom it may concern:

Be it known that I, AGHILLE Lorrnon, a

citizen of the French Republic, and resident of Plaine St. Denis, Seine, France, having invented certain new and useful Improvements in Variable-Speed Gearings, do hereby declare the following to be a specification.

This invention relates to improvements in variable-speed gearing for motor road ve.- hicles and particularly to the peculiar construction of the clutches and of the means for connecting the clutches with the hand levers.

Of the accompanying drawings forming partof this specification Figure l is a longitudinal section on line A-A of- Fig. 2. Fig. 2 is a cross section. Fig. 3 is a horizontal section on line B-B' of Fig. 2. 4 shows on a larger scale a diagrammatical View of the teeth of the clutches.

The variable-speed gear forming the object of the present invention, belongs to the well known type of speed gearings, in which two series of gearing of progressive diameter are placed the one on the shaft driven from the engine through a con ling device and the other on the shaft WlllCll transmits the motion to the wheels.

The improved variable-speed gearing is shifted along the driven axle f, cli1tch the axle when they revolve. The hubs of the loose pinion wheels 9, h, i, 7', are provided with teeth adapted to engage with the cogged sleeves Ic.- These cogged sleeves is are operated each through a separate fork l which at m is pivoted to the frame and has two arms n, n between which .the operating arm 0 is located which is pivoted with one end at m and the other end of which is guided in groove 3? of a shaft g, which also .may have suitable cams for acting upon said operating arm. Between the arms n, n of the coupling fork and the corresponding end of arm 0, springs 1-, 1- are provided. The

displacement of arm 0 is thus elastically transmitted to the fork l and consequently the variable-speed gearing can be actuated at any moment and without excessive resist- Specificationot Letteri Patent. I

Application filed August 7, 1907. Serial No. 387,93.

gears from axle s.

Patented Oct; 20, 19os.

ance, even when the teeth of the sleeve is bear upon the surface of the teeth of the coupling clutch instead of entering the spaces therebetween, in which case the springs will yield until the teeth are well en- The shaft 9 which operates the variablespeed gearing, is actuated through conical A cam is keyed upon shaft q or upon axle s which effects the uncoupling of the device when the speed is changed. This device, which combined with the above described speed gearing forms one of the characteristic features of this invention, consists of a cam having three bosses, which is mounted in such a manner that each of the bosses acts upon the uncoupling device when the speed is changed.

To prevent the clutches for two adjacent speeds from enteringfintooperation simultaneously, a connecting rod is provided which connects the two forks Z in such a manner that they are kept apart at a distance which prevents one sleeve to come into engagement with the corresponding clutch before the other sleeve is completely disengaged.

In the example shown in the drawings, conecting rod t is linked to the two. rear arms of forks Z, Z which operate the sleeves 7c, 70. This connecting rod t has eyes for the reception of the pins of the forks to give sufiicient liberty to each fork for the required displacement, the length of said slots being arranged in such a manner that none of the sleeves is can be coupled before the other one has been disengaged. The detail construction of this connecting rod may be varied as.well as its position and there could be used two connecting rods instead of one only.

a The toothing of the coupling sleeves suitably formed as shown in Fig. 4. Each tooth consists of an inclined part 3 which forms the outer surface and is connected with the bottom surface u of the adjacent notches through the surfaces 0, m which are radially arranged and run parallel to the axis.of rotation, said bottom surface of the notches being inclined parallel with the outer surfaces y. It is obvious that the notches of each clutch correspond exactly to the teeth of the opposite one. This configuration of the teeth assures the immediate engagement of the clutches in the normal direction of the transmission of energy and for a sufficient depth to resist this "effort; in

the teeth slide the one on the other Without meshing. The flattened part it permits the motor to retard the car when the same exceeds its normal speed.

What I claim as my invention and desire to secure by Letters Patent is Variable-speed gearing comprising a shaft two series of toothed Wheels of progressive diameter, one series being loosely mounted upon the shaft, coupling clutches for coupling the loose toothed wheels with the shaft, forks for operating said clutches fork located between'said two arms, a 1n connecting the ends of the three arms, spiral" springs upon said pin between each lateral arm and the guide arm, a connecting rod, connecting the forks of two adjacent clutches being slotted to permit a certain play to the forks and an operating shaft for the forks having guide grooves for the guide arms of said forks substantially as described and shown and for the purpose set forth.

In Witness whereof I have hereunto set my hand in presence of two Witnesses.

ACHILLE LOITR-ON.

Vitnesses HENRI BLOUIN, HANSON G. Coxn. 

